Barbed Defense (Su)

A
creature that strikes a hamatula with a melee weapon, an unarmed
strike, or a natural weapon takes 1d8+6 points of piercing damage from
the devil's barbs. Melee weapons with reach do not endanger a user in
this way.

Fear (Su)

A barbed
devil's fear attack affects any creature it damages with its claws. A
DC 20 Will save resists this effect, otherwise the victim becomes
frightened for 1d4 rounds. This is a mind-affecting fear effect. The
save DC is Charisma-based.

Grab (Ex)

A barbed devil can use its grab attack against a foe up to Medium size

Impale (Ex)

A barbed devil deals 3d8+9 points of piercing damage to a grabbed opponent with a successful grapple check.

Infernal Sacrfice

Hamatulas despise being summoned away from their duties in Hell for any
reason. A devil summoner who offers a hamatula rare treasures and exotic
gems valued at more than 2,000 gp gains a +2 bonus on all Charisma
checks made to compel the barbed devil into service, but only if the
task takes less than 24 hours to complete. Those who try to compel
hamatulas to longer terms of service, whatever the service might be,
take a -2 penalty on their Charisma checks.
Pathfinder Chronicles: Princes of Darkness, Book of the Damned Vol. I.
Copyright 2009, Paizo Publishing, LLC; Author: F. Wesley Schneider.

Sentinels
of the vaults of Hell, jailers of the darkest souls, and living weapons
of the infernal forges, barbed devils—known as hamatulas to
diabolists—enforce the strictures of the damned and safeguard the
nefarious works of greater devils. A hamatula enjoys the feel of warm
blood on its spines, and prefers to leap into melee when presented with
an opportunity for battle.

Hamatulas are collectors and
organizers, and are favorite allies of greedy summoners as they often
bring with them tempting treasures from Hell's vaults or know the paths
to deadly riches. Left to their own devices, the lairs of these devils
often bear the pierced trophies of their past victims, hung like
perverse bug collections on bloodied walls. Most barbed devils stand
upward of 7 feet tall and weigh 300 pounds, though their leanly muscled
bodies appear much larger due to the constantly growing and adjusting
spines that protrude from their razor-sharp bodies.